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d612d62c AC |
1 | (* HCoop Domtool (http://hcoop.sourceforge.net/) |
2 | * Copyright (c) 2006, Adam Chlipala | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or | |
5 | * modify it under the terms of the GNU General Public License | |
6 | * as published by the Free Software Foundation; either version 2 | |
7 | * of the License, or (at your option) any later version. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, | |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License | |
15 | * along with this program; if not, write to the Free Software | |
16 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. | |
17 | *) | |
18 | ||
19 | (* Code for receiving and executing configuration files *) | |
20 | ||
21 | structure Slave :> SLAVE = struct | |
22 | ||
23 | datatype file_action = | |
24 | Add | |
25 | | Delete | |
26 | | Modify | |
27 | ||
28 | type file_status = {action : file_action, | |
29 | domain : string, | |
6ae327f8 | 30 | dir : string, |
d612d62c | 31 | file : string} |
36e42cb8 | 32 | |
d612d62c AC |
33 | val fileHandler = ref (fn _ : file_status => ()) |
34 | val preHandler = ref (fn () => ()) | |
35 | val postHandler = ref (fn () => ()) | |
36 | ||
37 | fun registerFileHandler handler = | |
38 | let | |
39 | val old = !fileHandler | |
40 | in | |
41 | fileHandler := (fn x => (handler x; old x)) | |
42 | end | |
43 | ||
44 | fun registerPreHandler handler = | |
45 | let | |
46 | val old = !preHandler | |
47 | in | |
48 | preHandler := (fn () => (handler (); old ())) | |
49 | end | |
50 | ||
51 | fun registerPostHandler handler = | |
52 | let | |
53 | val old = !postHandler | |
54 | in | |
55 | postHandler := (fn () => (handler (); old ())) | |
56 | end | |
57 | ||
58 | fun handleChanges fs = (!preHandler (); | |
59 | app (!fileHandler) fs; | |
60 | !postHandler ()) | |
61 | ||
8df2e702 AC |
62 | fun shell ss = OS.Process.isSuccess (OS.Process.system (String.concat ss)) |
63 | ||
64 | fun shellF (ss, msg) = | |
65 | let | |
66 | val s = String.concat ss | |
67 | in | |
68 | if OS.Process.isSuccess (OS.Process.system s) then | |
69 | () | |
70 | else | |
71 | ErrorMsg.error NONE (msg s) | |
72 | end | |
73 | ||
6e62228d AC |
74 | fun hostname () = |
75 | let | |
76 | val inf = TextIO.openIn "/etc/hostname" | |
77 | in | |
78 | case TextIO.inputLine inf of | |
79 | NONE => (TextIO.closeIn inf; raise Fail "No line in /etc/hostname") | |
80 | | SOME line => (TextIO.closeIn inf; String.substring (line, 0, size line - 1)) | |
81 | end | |
82 | ||
8df2e702 AC |
83 | fun concatTo p fname = |
84 | let | |
85 | fun visitDir dname = | |
86 | let | |
87 | val dir = Posix.FileSys.opendir dname | |
88 | ||
89 | fun loop () = | |
90 | case Posix.FileSys.readdir dir of | |
91 | NONE => Posix.FileSys.closedir dir | |
92 | | SOME fname' => | |
93 | let | |
94 | val path = OS.Path.joinDirFile {dir = dname, file = fname'} | |
95 | in | |
96 | if Posix.FileSys.ST.isDir (Posix.FileSys.stat path) then | |
97 | visitDir path | |
98 | else if p fname' then | |
99 | shellF ([Config.cat, " ", path, " >>", fname], | |
6ae327f8 | 100 | fn cl => "Error concatenating: " ^ cl) |
8df2e702 AC |
101 | else |
102 | (); | |
103 | loop () | |
104 | end | |
105 | in | |
8df2e702 AC |
106 | loop () |
107 | end | |
108 | in | |
6ae327f8 | 109 | TextIO.closeOut (TextIO.openOut fname); |
6e62228d | 110 | visitDir (OS.Path.joinDirFile {dir = Config.resultRoot, file = hostname ()}) |
8df2e702 AC |
111 | end |
112 | ||
ed9fda3a AC |
113 | fun enumerateTo p sep fname = |
114 | let | |
115 | val outf = TextIO.openOut fname | |
116 | ||
117 | val first = ref true | |
e0b0abd2 | 118 | val baseLen = length (String.fields (fn ch => ch = #"/") Config.resultRoot) + 1 |
ed9fda3a AC |
119 | |
120 | fun visitDir dname = | |
121 | let | |
122 | val dir = Posix.FileSys.opendir dname | |
123 | ||
124 | fun loop () = | |
125 | case Posix.FileSys.readdir dir of | |
126 | NONE => Posix.FileSys.closedir dir | |
127 | | SOME fname' => | |
128 | let | |
129 | val path = OS.Path.joinDirFile {dir = dname, file = fname'} | |
130 | in | |
131 | if Posix.FileSys.ST.isDir (Posix.FileSys.stat path) then | |
132 | visitDir path | |
133 | else if p fname' then | |
134 | let | |
135 | val toks = String.fields (fn ch => ch = #"/") dname | |
136 | val toks = List.drop (toks, baseLen) | |
137 | val dom = String.concatWith "." (rev toks) | |
138 | in | |
139 | if !first then | |
140 | first := false | |
141 | else | |
142 | TextIO.output (outf, sep); | |
143 | TextIO.output (outf, dom) | |
144 | end | |
145 | else | |
146 | (); | |
147 | loop () | |
148 | end | |
149 | in | |
150 | loop () | |
151 | end | |
152 | in | |
6e62228d | 153 | visitDir (OS.Path.joinDirFile {dir = Config.resultRoot, file = hostname ()}); |
ed9fda3a AC |
154 | TextIO.closeOut outf |
155 | end | |
156 | ||
7db53a0b AC |
157 | fun readList fname = |
158 | let | |
159 | val inf = TextIO.openIn fname | |
160 | ||
161 | fun loop acc = | |
162 | case TextIO.inputLine inf of | |
163 | NONE => rev acc | |
164 | | SOME line => loop (String.substring (line, 0, size line - 1) :: acc) | |
165 | in | |
166 | loop [] | |
167 | before TextIO.closeIn inf | |
168 | end | |
169 | ||
170 | fun writeList (fname, ls) = | |
171 | let | |
172 | val outf = TextIO.openOut fname | |
173 | in | |
174 | app (fn s => (TextIO.output (outf, s); | |
175 | TextIO.output1 (outf, #"\n"))) ls; | |
176 | TextIO.closeOut outf | |
177 | end | |
178 | ||
d612d62c | 179 | end |